function withData(param){
  return param < 10 ? '0' + param : '' + param;
 }
 function getLoopArray(start,end){
  var start = start || 0;
  var end = end || 1;
  var array = [];
  for (var i = start; i <= end; i++) {
  array.push(withData(i));
  }
  return array;
 }
 function getMonthDay(year,month){
  var flag = year % 400 == 0 || (year % 4 == 0 && year % 100 != 0), array = null;
 
  switch (month) {
  case '01':
  case '03':
  case '05':
  case '07':
  case '08':
  case '10':
  case '12':
   array = getLoopArray(1, 31)
   break;
  case '04':
  case '06':
  case '09':
  case '11':
   array = getLoopArray(1, 30)
   break;
  case '02':
   array = flag ? getLoopArray(1, 29) : getLoopArray(1, 28)
   break;
  default:
   array = '月份格式不正确，请重新输入！'
  }
  return array;
 }
 function getNewDateArry(){
  // 当前时间的处理
  var newDate = new Date();
  var year = withData(newDate.getFullYear()),
   mont = withData(newDate.getMonth() + 1),
   date = withData(newDate.getDate()),
   hour = withData(newDate.getHours()),
   minu = withData(newDate.getMinutes()),
   seco = withData(newDate.getSeconds());
 
  return [year, mont, date, hour, minu, seco];
 }
 function dateTimePicker(startYear,endYear,date) {
  // 返回默认显示的数组和联动数组的声明
  var dateTime = [], dateTimeArray = [[],[],[],[],[],[]];
  var start = startYear || 1978;
  var end = endYear || 2100;
  // 默认开始显示数据
  var defaultDate = date ? [...date.split(' ')[0].split('-'), ...date.split(' ')[1].split(':')] : getNewDateArry();
  // 处理联动列表数据
  /*年月日 时分秒*/ 
  dateTimeArray[0] = getLoopArray(start,end);
  dateTimeArray[1] = getLoopArray(1, 12);
  dateTimeArray[2] = getMonthDay(defaultDate[0], defaultDate[1]);
  dateTimeArray[3] = getLoopArray(0, 23);
  dateTimeArray[4] = getLoopArray(0, 59);
  dateTimeArray[5] = getLoopArray(0, 59);
 
  dateTimeArray.forEach((current,index) => {
  dateTime.push(current.indexOf(defaultDate[index]));
  });
 
  return {
  dateTimeArray: dateTimeArray,
  dateTime: dateTime
  }
 }
 module.exports = {
  dateTimePicker: dateTimePicker,
  getMonthDay: getMonthDay
 }
 
 